EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	$ 6.0	$ 6.6	$ 13.6	$ 15.4
Royalty and interest income	1.5	1.6	3.1	3.2
Equity, royalty and interest income from investees	7.5	8.2	16.7	18.6
Fleetguard Filters Pvt. Ltd.
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	4.2	4.6	10.5	12.2
Shanghai Fleetguard Filter Co. Ltd
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	1.7	1.9	2.9	3.0
Filtrum Fibretechnologies Pvt. Ltd
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	$ 0.1	$ 0.1	$ 0.2	$ 0.2